19640328337 has 32 divisors (see below), whose sum is σ = 23579942400. Its totient is φ = 15994480128.

The previous prime is 19640328313. The next prime is 19640328347. The reversal of 19640328337 is 73382304691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19640328337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19640328347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24642423 + ... + 24643219.

It is an arithmetic number, because the mean of its divisors is an integer number (736873200).

Almost surely, 2^19640328337 is an apocalyptic number.

It is an amenable number.

19640328337 is a deficient number, since it is larger than the sum of its proper divisors (3939614063).

19640328337 is a wasteful number, since it uses less digits than its factorization.

19640328337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665.

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 19640328337 in words is "nineteen billion, six hundred forty million, three hundred twenty-eight thousand, three hundred thirty-seven".